Button-hole attachment for sewing-machines



(Model.) 6 Sheets --Sheet 1. J. W. BEODGETT.

BUTTON HOLE ATTACHMENT FOR SEWING MACHINES. No. 279,320. Patented June 12,1883.

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(ModeL) 6 Sheets-Sheet 2.

J. W. BLODGETT. BUTTON HOLE ATTACHMENT FOR SEWING MACHINES. No. 279,320] Patented June 12,1883.

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J. W. BLODGETT. BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.

No. 279,320. Patented June 12,1883.

Jay; 10 g (Model.) 7 6 Sheets-Sheet 4. J. W. BLODG-ETT.

BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.

No. 279,320. Patented June 12,1888.

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(ModeL) 6 Sheets-Sheet 5. J. W. BLODGETT.

BUTTON HOLE ATTACHMENT FOR SEWING MACHINES. No. 279,320. Patented June 12,1883.

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(ModeL) J. W. BLODGETT. BUTTON HOLE ATTACHMENT FOR SEWING MAUHINES. No. 279,320. Patented J1me 12,1883.

' 7 sewing-machine; Fig. 2, a detail of the sup- UNITED STATES PATENT. OFFICE.

JOHN \V. BLODGETT, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 279,320, dated June 12, 1883.

Application filed September 12,1881. (ModeL) T0 (bl/Z whom, it may concern,-

3e it known that 1, JOHN W'. BLODGETT,1*@- siding at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented new and useful Improvements in Button-Hole Attachments for Sewing-Machines, of which the following is a full description, reference being had to the accompanying drav 'ings, in which- Figure l isa front side elevation, showing the devices constituting the button-hole attachment attached to a \Vheeler & "Wilson No.

porting bracket or arm and a portion of the bed-plate in side elevation, showing the opposite side to that shown in Fig. 1, with the devices forming the button-hole attachment in position; Fig. 3, a detail, being a top .or plan view of the feed-ratchet, its operatinglever, check-pawl, and head for attaching the parts to the presseni'oot bar; Fig.4,a detail, being a front end elevation showing the bi'itton-hole attachment in position on the machine; Fig.5, a detail,being a top or plan view of the head or clamp for attachment of the feed-lever, vibrating cam, and device for operating the lever or cam; Fig. 6,a detail, being a side elevation, partly broken off, of the head or clamp shown in Fig. 5; Figs. 7 and S,details, being a side elevation and a top or plan view, respectively, of the stop for limiting the throw of the vibrating cam; Fig.9,a detaihbeing a side elevation of the needle-clamp shank or support Fig.l0,a detail,being a top or plan view of the needle-clamp shank or support; Figs. 11 and 12,details,being a side and front elevation,respectively, of the needle-clamp withthe needle therein. Fig.12 is a section taken on lineww, Fig.11; Fig.13,a detail, being a side elevation of the vibrating cam, with the body thereof partly in section; Fig.14,a detail,beinga front elevation of the vibrating cam; Figs. 15 and 16, details of the journal or pivot in which the vibrating cam is mounted; Fig.17,a detail,being a front side elevation,showing the operating devices for the feed; Fig. 18,2. detail showing the head or support,the vibrating cam, and the spring for keeping the cam properly centered; Fig.19,a detail,being a top or plan view of the cloth clamping and carrying device; Fig. 20,a detail,'being atop or planview of the bed-plate of the cloth-clamp; Fig. 21,a detail,being a top or plan view of the horizontal reciprocating plate of the cloth-clamp; Fig. 22,a detail enlarged,being a top or plan view of the upper plate of the cloth-clamp with the feed-rack thereon; Fig.23,a vertical longitudinal section on line m w of Fig.22, showing the upper plate of the cloth-clamp, the clamp-lever, and the cloth-holding plate; Fig. 24, a vertical longitudinal section on line 1 y of Fig. 22,'showing the upper plate of the cloth-clamp, the rackhead and rack, the adj Listing-bar, and the guideplate for working different lengths of buttonholes; l1ig.25,avertical cross-section on line z z of Fig.22,showing the upper plate of the cloth clamp,the holding-plate, the rack-head for the raclgthe adjusting-plate,and the clamping-1e ver.

This invention relates to devices which are to be attached to a sewing-machine and operated therefrom for the purpose of working button-holes on the machine, and has for its obj cct to construct an attachment for the purpose designated, the parts composing which shall be simple in construction, positive and reliable in action, and easily operated, and have the operation of such nature that it will be automatic after the material has been placed in position, requiring no attention from the operator during the operation of working the button-hole, the devices whichcarry the cloth being also self-acting in giving the cloth the proper line of travel, and the devices for throwing the needle to cast the thread being alsoselfacting, and the two sets of devices coacting with each other to produce the required movements for working the button-hole. This I accomplish by the mechanism illustrated in the accompanying drawings, and hereinafter described and claimed.

In the drawings, A represents the main head or support of the attachment; A, thedepending post or arm for attachment of the vibrating cam; A, the post or arm for attachment of the return-spring for the feed-lever; A the side arm or support for attachment of the vibrating cam-spring; A*, the opening for the reception of the head of the machine; 13, the shank or tongue which receives and supports the needle-clamp; B, the head or collar by which the shank is attached tothe needle-bar; O C, the sliding needle-clamp; O, the needle; D, the vibrating switch or cam; E, the stop Ioo for the vibrating cam; F, the pin supporting the spring for the Vibrating cam; F, the set nut for holding the pin F; G, the vibratingcam spring; H, the return-spring for the feedlever; I I I, the feed-lever; J J", the lever for the feed-pawl; J, the opening for the connection of the feedlever with the pawl-lever; K, the feed-wheel; L, the arm carrying the checkpawl; M,- the secondary head for attaching the feed wheel an d devices to the presser-foot bar; N, the base-plate of the cloth clamping and carrying device; 0, the transverse reciprocating plate of the cloth clamping and carrying device; 1, the horizontal reciprocating plate of the cloth clamping and carrying device; Q, the cloth-gripping plate; Q, the secondary plates of the cloth gripping plate; R R, the clampinglever; B, the post or standard supporting the lever; S S, the arm orsupport for the rack; T T, the side racks; T, the movable bar carrying an end rack" the stationary plate carrying an end rack; U, the guideplate; V, the needlebar; Y, the arm for operating the needle-bar; V, the slip-collar for adjusting the needle-bar in relation to its operating arm or lever 'V; NV, the presser-foot bar; X X, the head of the machine, carrying the p resser-fo 0t and needle-bar; Y Y, the bracket or arm supporting the head X X; Z, the bed-plate of the machine; a, the

turned ends of the side pieces of the head or support A; (1,, the set-screw for securing the head A to the head X ofthe machine; (1 the groove at the upper end of the post A for attachment of the spring H; a, the slot in the arm A for adjusting the pin F; b, the plate or flange 011 the end of the shank B; b, the opening between I) and the head or socket B for the needle-clamp; c, the tongue or guide on the needleclamp; c, the set-screw for attachment of the head or socket; (I, the acting portion of the vibrating cam; d, the anti-friction roller; (1, the opening for the pin or journal of the cam; c, the end of the stop against which the cam strikes; 0, the slot for adjusting the position of the cam-stop; e, the opening for the passage of the feed-regulating screw; f, the slot for the pin F to receive the end of the spring G; 1", the neck of the pin which enters the slot (15; g, the bar or arm portion of the spring G; g, the coil of the spring G; h, thescrew-threaded shank or body of the journal or pivot for the vibrating cam; h, the collar on the journal or pivot; h, the end of the journal or pivot on which the cam is mounted; it", the washer for taking up the space in the form of construction shown be tween the face of the cam and the face of the support A; t, the end of the arm I of the feedlever which enters the slot in the pawllever; if, the pivot ofthe feed-lever; i, the feed-regulating screw; 7, the feed-pawl; j, the pin or pivot of the feed-pawl; j, the spring for the feed-pawl; k, the pinion which drives the rack; A, the guide or center pin for keeping the pinion in mesh; Z, the check-pawl; Z the checkpawl pivot or pin; 1, the check-pawl spring; m the feed-wheel pin or journal; m, the setscrew for keeping the journal m in. position and allowing it to revolve freely; m, the pin or look for securing the head M to the presserfoot bar; a, the stationary guides on the plate N; n, the removable guides on the plate A; n, the studs or pins for the guides at; a, the clamping-nuts for holding the guides a in place; 0, the stationary guides on the plate 0; 0, the removable guides on the plate 0; 0, the studs or pins for the guides 0; 0, the clamping-nuts for the guides 0,- p, the slot in the movable end rack for adjusting such rack; p, the set-screw for locking the end rack in position when adjusted; q, the setscrew for at taching the plate Q. to the plate 1.; q, the elongated slot in the plate Q; q, the serrations or teethin the secondary plates Q; r, the stopface of the lever It R, against which the plate Q, bears when not in use; r, the end of the lever B R, for forcing the plate Q down. and holding it firmly; r, the pin or pivot of the lever R R; s, the vertical slot in the head or arm S for the insertion of the guide-plate U; f, t, and t, the cogs or leaves on the rack. T T T; w w, the guide portions of the plate U.

The head A may be made of steel or other suitable material which can be cast or otherwise formed into shape to have a body, with an opening, A*, to receive the head of the ma chine, the body being formed of a side piece and two end pieces, with turned-in ends a, to

leave an opening for the passage of the needle cated a post or standard, A, the upper end 01.

which, as shown, is provided with a groove, 0, in which is hooked the-upper end of the coil-spring H. This post or standard A may be cast or formed with the support A, or may be an independent piece, suitablysecured th ereto. On the under face of the support A, and extending down therefrom is, located another post or standard, A, the lower end of which is provided with a slot, as shown in Fig. 6. This post or standard A may be formed with the head A, or may be an independent piece suitably secured thereto. Extending out from the body of the support A is an arm or extension, A'', having at its outer end a slot, 0.

The shank B and collar B may be made of cast steel or other suitable material, and may be formed of separate pieces or of a single piece, the end of the shank having a plate or flange, b, secured thereto or formed thereon, so as to leave a space, 7), between it and the collar B, and the collar having a suitable opening to receive the needle-bar, to which it is attached by means of a setscrew, a, or in some other suitable manner.

The needle-clamp is located on the shank B, and is formed in two sections or parts, one of which, 0, has a suitable opening to receive the shank of the needle which is held therein'bymeans of a set-screw, as usual, and the other portion, 0, is provided at or near its center with a vertical flange or guide, 0, as shown in Figs. 10, 11, and 12. The sections or parts 0 C of this needle-clamp are secured together by means of screws or otherwise, and their adjacent faces are provided with openposition to pass through the opening in the bed-plate of the machine, as usual, the opening forthe passage of the needle being in the form of an elongated slot to allow the needle to pass in the different positions in which it stands by the throw of the clamp.

The vibrating switch or cam D is formed from a piece of steel or other suitable material, and has on-its acting face a triangular or sharp V-shaped portion, (1, by means of which the cam is turned or swung 011 its pivot to occupy different vertical planes through the action of the flange or guide 0. This cam D is provided with an opening, c to receive a pin or pivot, h by means of which it is journaled or pivoted so'as to swing or turn freely. This cam is located on the inner face of the standard or post A, and, as shown, the body or stem h of its journal or pivot h'passes through the elongated slot in the lower end of the standard or post A, and is screw-threaded to receive a nut, by means of which it is clamped and held firmly in position, and, as shown, a collar, 71, and a washer, h, are provided, the collar forming a base against which the face of the cambears, and the washer being for the purpose of taking up the space between the collar and the face of the arm A, so as to bring the cam in proper relation with the flange or guide a, and the cam can be adjusted transversely to have its inclined or acting portion 11 properly centered to coact with the guide or flange 0 through the elongated slot which re ceives the stem h.

The washer I1? is not necessary, as the collar can be made of sufficient width to bring the cam in position. This cam D is pivoted midway of its ends, and is so located and arranged in relation to the rib or flange c on the needleclamp as that such rib or guide will pass alternately' on opposite sides of the acting portion cl, such movement being produced by the action of the rib or guide itself, which, in its upward movement, strikes on one of the inolined faces of (Z and carries the cam over, and at the same time the action of the inclined face and the guide 0 will carry the clamp also over, so that on the descent of the needle the guide will pass downward without disturbing the cam, but on the upstroke will engage the opposite inclined face of d and throw the cam in the opposite direction, and with it the needle-clamp, which movements will continue withea'ch alternate stroke of 'tllB'IlOGCllGdMl,

journaled or pivoted an anti-friction roller or wheel, d, against the face of which the end of the spring-arm g of the spring (ibears, which spring G is located on a pin or stud, F, having a squareshouldered portion, f, which en ters the slot (15 in the arm A, and the stud or pin F is locked and held in adjustment by means of a set nut or head, F, the neck or lower end of the pin being screw-threaded to receive the nut or head. I have just stated that the neck or lower end of this pin passes through the slot a, that is formed in the bar A, and that on said end of the pin is fitted a nut, F. Now, it will be evident that by means of this arrangement of parts the nut can. be loosened and the pin moved along the slot, and the nut then tightened up against the bar A. By this means the pin can be adjusted and held in position as required.

The body or coiled portion of the spring is located on the stud or pin F, and is prevented from turning by having its end inserted in a slot or opening, f, in the pin, or in any other suitable manner.

The object of the spring G is to prevent the cam D, through the spring action of the arm g, from becoming centered and remaining on its center after the passage of the rib or guide a, the end of the spring arm {1 being so arranged and bearing in such manner as to throw the cam over after it has passed the center; and in order to insure this result the pin F is made adjustable, so that by moving itin or out the end of the arm y can be made to bear prop erlyonthe anti-friction roller (1 to keep the cam off. its center. By pivoting the cam between its ends it will be seen that when turned in either direction, so as to be off its center, it

will be reversedaccordingly, by which means the flange or rib c in the ascending and de scending movements of the needle-bar throws the cam off from its center.

The swing of the vibrating cam G is limited by a stop, 6, formed by the end of the bent or curved portion of the piece 15, the body of which is provided with a slot, 6, (shown in Fig. 7 to receive the shank or stem 71 of the cam pivot or journal, by means of which the piece E is attached to the lower end of the post or standard A, the slot 6 being for the purpose of adjusting the stop or end 6 in proper relation to the cam D for the length of swing.

This piece E has a screw-threaded opening, e,

. for the passage of the set-screw i, which open ing is so located as tobring the end of the set screwin line wit-h the feed-lever. Other forms I, of the feed-lever, and this spring is for the purpose of returning the lever on the descent of the needle-bar and bringing it in position to be again acted on at the ascent of such bar.

The feed-lever is formed of two arms or por tions, I I, standing at an angle to each other, and pivoted at or near the center of their juncture by a pin or screw, i, to the face or the post or standard A, the arm I, to which the spring H is connected, extending beyond the pivot a sufficient distance for the spring to act and to return the lever. The arm or portion I of this lever ext-ends downward, and its lower end, i, is made smaller than the other part and enters a slot, J, in the end of the pawl-lever J. The other arm, I, extends out horizontally, and is located and arranged so as to come in contact or be engaged by the collar 13, which has a groove or opening, in which the arm rests to prevent it from slipping while being raised by the action of the needle-bar.

The feedlever J is formed as shown in Fig. 3, and its body or main portion is provided with a slot, J to receive the end i of the'feedlever, and its secondary portion J projects be yond the periphery of the feedavheel, and has attached thereto a feed-pawl, j, which pawl has its acting face formed on a curve corre sponding to the circle of thefeed-wheel, and provided with serrations or grooves to engage the serrations or grooves on the periphery of the feed-wheel. This pawl j is pivoted to a pin or pivot, j, depending from the end J, and .located at the proper point to bring the pawl in position for work, and the pawl held on its pivot by a spring, j, one end of which is connected with the pivot, and the other end is made to engage with the pawl and force its acting face against the periphery of the wheel K in such manner as to cause the pawl to act withthe forward movement of the lever and be non-acting on the return movement, so that with each forward movement of the lever the wheel K will be advanced a distance corresponding to the throw of the lever, which dis tance coincides with the feed of the machine in making the stitch.

The wheel K has at its center and extend ing upward a journal or pivot, m, and its periphery is serrated or notched to form a rough surface. At the center of this wheel, on its under side, and formed thereon or suitably secured thereto, is a pinion, h, from the center of which extends down a stud or pin, k. This wheel is supported by a head or support, M, having an opening for the passage of the press er-foot bar, to which bar it is attached, as

shown, so as to be rigid, by a pin, m, which passes through the head and the needle-bar,

as shown in t. The journal or pin for the wheel K is held in position, as shown, so as to revolve by means of a set-screw, m, the end of as to bring the body or main portion in proper relation with the feed-lever and its end J in proper position for the pawl j to act on the periphery of the wheel.

The arm or plate L may be formed with the head M, or may be an independent piece firmly secured thereto. This arm extends out from the head, and to its outer end is secured a pawl, l, pivoted onto a pin or pivot, l, and held in position by a spring, Z. This pawl Z and its pivot Z and spring Z are similar in con struction and arrangement to the pawl j, its pivot j, and spring j, and is for the purpose of acting as a check to prevent the wheel K from being returned on the return movement of the lever .l, which might happen in some cases if this check-pawl were not provided.

The base-plate N, transverse reciprocating plate 0, and horizontal reciprocating plate P may each be made of sheet-steel or other suit able material which can be cut or formed into the desired shape. The base-plate N is to have a body or main portion of sufficient dlll1611 sions to furnish a support for the transverse reciprocating plate 0, and is to be so formed as to be attached to the bedplate of the machine by set-screws or otherwise, so as to be held firmly. On the upper face of the body of this plate N are located guides or cars a n, the guides or being stationary and secured in place by rivets or otherwise, and the-guides a being removable and being held in place by means of a jam or set nut, a, which screws onto the end of the stud a, on which the guides are located, the studs being secured to the plate N. These guides or cars 11. n are located on the plate N, so as to form clamps to hold the plate 0 in position and allow it to reciprocate transversely of the machine, the edges of the plate 0 coming beneath the edges of the guides or ears a a.

As shown, the plate N has two arms or extensions, each providcd with an opening for the passage of a set-screw, by means of which the plate is attached to the bed-plate of the form of sewing-machine shown.

The plate 0 has a main body of sufficient dimensions to furnish a support for the plate P, with end extensions, 0, which come beneath and between the cars a n,- the body of the plate being shorter longitudinally than the distance between the cars, so as to permit of the movement of the plate 0. face of this plate 0 are cars 0 0, similar in construction and arrangement to the cars n n,

the ears 0 being stationary and the ears 0 re movable, and held in place on their studs 0 by a jam or set nut, 0. These ears or guides IIO In the upper other suitable material, and is attached at its" rear end, by a set-screw, q, or otherwise, to the rear end of the plate P, and its front end is provided with an elongated slot, q, corresponding and coinciding with the slot in the plate P, and extending down through this slot are the serrated edges q of the secondary plates Q,which plates are attached, one on each side of the slot, in any suitable manner, to the face of the plate Q. This plate Q, with the secondary plates Q and their serrated edges q, furnishes ameans for clamping andsecurely holding. the cloth with the button-hole slit in line with the center of the elongated slot q, the teeth or ser- 7 rations, when the plate Q is forced down, en-- tering the material and catching and holding it in a firm manner. The plate Q is returned by its own elasticity, and is forced or held down by the lever B R, which lever is pivoted by means of a pin or pivot, r, to a post or upright, R, attached to the platel and extending up through a suitable opening above the plate Q. The head R of this lever has a face, r, against which the plate Q strikes when raised, and this head R has an arm or extension, 1, having an inclined face, which, when the arm R of the lever is raised, comes in contact with the plate Q and forces such plate down and holds it when down, and at the same time furnishes the means'for forcing the serrations or teeth q into the material.

The head or support for the rack has its in ner portion, S, secured in any suitable manner to the race of the plate I, and its outer portion, S, stands on a higher plane than the inner portion, and furnishes the support prop er for the rack. This outer portion is provided with a vertical slit, 8, extending from its outer end inward, in which slit is located and secured a plate, U, formedas shown in Fig. 24, having its two sides, a and a, ct different lengths,

. and these sides form a guide, against which the pin kbears to hold the pinion It in mesh with with the leaves of the pinion 71', so as to mesh therewith, the racks being located so as to leave a space between them of greater width than the diameter of the pinion It, so that the pinion will be engaged with but. one side rack at the same time. At each end of these side, racks, T, are located end racks, one of which T, is formed by cogs or leaves t"on the. end of a plate, which plate is suitably secured, so as to be stationary, to the face of the bar S, and the other, T, is formed by cogs or leaves t on the end of a plate or bar,which bar is provided with an elongated slot, 1), for the passage of a set-screw, p, by means of which the plate is attached to the bar S. This plate or rack T is adjustable through the slot 19, so that the cogs or leaves t can be advanced or receded to give the pinion a length of travel corresponding to the length of the button-hole slit. The pinion k travels down on one of the side racks, thence across an end rack, back and'up the other side rack, and across the other end rack to the starting-point, or vice versayand nomatter at what point on the rack the pinion may start, it will have the proper travel around the racks to give the required movement for working the button-hole slit, the movement of the pinion on the side racks giving 'a longitudinal. travel to the material through the longitudinal reciprocating movement of the plate 1?, and the travel of the pin ion across the end racks giving a transverse travel to the material at the end of the buttonhole slit through the transverse reciprocating "movement of the plate 0. The pinion k is rotated from the feed-wheel K through the rotation of the pinion, through its engagement with the side racks, T, imparts a reciprocating movement to the plate I, to which the racks are attached,through the bar' or support S S, and the rotation of the pinion in passing across the end racks gives atransverse reciprocating movement to the plate 0 through the connection of the plate P therewith.

The parts represented by the letters V,V, V, WV, X, X, Y, Y, and Z are of the usual forms of construction, as shown, of a \Vheeler \Vilson No. 7 sewing-machine; but these parts may be of any of the usual and wellknown forms of construction and arrangement in other machines, the head A being formed to adapt it to be attached to the head of the ma chine with which it is to be used.

In operation the cloth is inserted between the plates P and Q, at the outer end thereof, with the button-hole longitudinally in line with the center of the slot in. the plate Q, and the slot inthe plate 1, which slots are in line with the needle-opening in the bed of the machine and with the movement of the needle. The plate Q is then forced down by raising the arm R of the lever, forcing the serrations -or teeth q into the material on each side of the slit. The machine is then started, and at each descent of the needle-bar the stitch will be made, as usual. As the needle-bar descends the material will remain stationary, the several devices being non-acting; but on the ascent of the needle-bar the material will be advanced the required length of feed for the stitch, the several devices coacttoo the arm I outward, and with it the lever J,

but imparting no movement to the feed-wheel K, the pawl 7' simply sliding on the periphery of the wheel in this movement, and the wheel being held stationary. by the check-pawl I, as before described, causing no movement of the plates 0 P, and in this descending movement the guide or rib a will pass down one of the inclined faces of (1 until it leaves the end of the cam, when the action of the spring-arm 9 will throw the cam over. and bring the opposite inclined face of d in position to be engaged by the face or side of c on the ascent of the needlebar, and on such ascent the engagement of c with such inclined face will crowd or force the needle-clamp over the limit of its movement, and on the next descent of the needle-bar the rib or flange 0 will pass down the incline of (Z with which it was engaged on its ascent until it passes the end of V the cam D,

when the spring or spring-arm y will act to throw the cam into position for the rib or flange a to engage the other or opposite face of d 011 the ascent of the needle-bar, which engagement will throw or force the needleclamp back or in the opposite direction, and this alternate engaging of the rib or flange c with the ward, and with it the lever J, causing the pawl j on the-end of such lever to impinge on the engagement with the cogs or leaves of the rack T T T, move the plates 0 and P, as before described, and such movements will continue until the entire length of the button-hole slit has been worked. The length of longitudinal movement of the rack is determined by the length of guide on the plate U, such guide holding the pinion, through the pin it, in engagement with the cogs or leaves 15 until the end of the guide is reached, when the pinion it passes across the end rack and onto the opposite side rack, with which it is held in engagement by the engagement with the opposite face of the guide. When the entire length of the button-hole slit has been traversed, the machine is to be stopped, the arm R of the lever thrown down, releasing the material from the holding-plate Q, and allowing it to be withdrawn and again inserted in a position for the next button-hole slit when. the operation just described is repeated.

The length of stroke of the feed-lever is con trolled by the set-screw i, the end of which can be made to operate farther in and out, and thereby limit the swing of the feedlever.

WVhat I claim as new, and desire to secure by Letters Patent, is'

l. The sliding clamp C C, carrying the needle, and provided with a rib or flange, c, and supported on a shank, B, attached to the needle-bar, in combination with the vibrating cam D, pivoted midway of its ends and thereby balanced, and having a V-shaped acting portion, (1, the pivot upon which said cam D turns being supported in the lower end of the standard A, and the said cam being also located relatively to the flange 0, so that during operation said flange will pass alternately on opposite sides of the acting portion d, whereby the movements of the cam are produced by the direct action of the flange upon its act ing portion, substantially as and .for the pun poses specified.

2. The sliding needle-clamp O O, carrying aneedle, and provided with a rib or flange, 0, and supported by a shank, B, attached to the needle-bar, in combination with the balanced vibrating cam D, having an acting portion, (1, spring or spring-arm r and head or support A, constructed as described, and carrying the cam and feeding device, said cam being pivoted midway of its ends, and being turned by the action of the flange c on opposite sides of its acting portion (1, substantially as and for the purposes specified.

3. The sliding needle-clamp C O, carrying the needle, and PIOXiClOd with a flange or rib, c, and supported by a shank, B, attached to the needle-bar, in combination with the vibrating cam D, having an acting portion, (7, and provided with an anti-friction roller, d,

spring or spring-arm g, and adjustable pin F,

for keeping the spring or spring-arm in proper relation to prevent the cam from centering, substantially as and for the purpose specified.

4. The sliding needle-clamp C, provided with a flange or rib, c, and supported by a shank, B, attached to the needle-bar, in combination with a vibrating cam, 1), having an acting portion, (1, and provided with an antifriction roller, (1, spring or spring-arm 9, adjustable pin F, and head or support A, carrying the cam and the feedoperating devices,

. substantially as and for the purposes specified.

The sliding needle-clamp (J 0, provided with a flange or rib, c, and supported by a shank, B, attached to the needlebar, in combination with the vibrating cam D, having an acting portion, (1, stop 0, zuijustable platel l, and head or support A, substantially as and for the purposes specified. v

6. The'sliding needle-clamp O 0, provided with a flange or rib, c, and supported by a shank, B, attached to the needle-bar, in combination with a vibrating cam, D, having an acting portion, (1, adjustable stop E 6, spring or spring-arm anti-friction roller (1, adjustable pin F, and head or support A, substair tially as and for the purposes specified.

7. The combination of 'the vibratory twoarmed feed-lever I I, operated from the needle-bar, and the return-spring H, with the IIO pawl-lever J J, formed witha slot receiving the one arm of the feed-lever, the feed-pawl j, piv oted to the said pawl-lever, andthe serrated feedwheelK, for imparting an intermittent rotary movement to the feed-pinion k, said members being organized substantially as and for the purposes specified.

8. The feed-lever I I, operated from the needle-bar, pawl-lever J J, carrying the feedpawl j arm or plate L, carrying the checkpawl l, and head or block M, in combination with the feed-wheel K, provided with serrations on its periphery, and having a journal or pivot, m, substantially as and for the purposes specified.

9. Ahead or block, M, adapted to be attached to the presser-foot bar, in combination with a pivot or journal, on, of the feed-whee1 K, the plate or arm L, carrying a'check-pawl, the pawl-lever J J, carrying a feed-pawl, and a mechanism for operating the said pawl-lever, substantially as specified.

10. A feed-wheel, K, provided at its center with a pinion, 7c, and guide-pin k, pawl-lever J J, carrying a feed-pawl, and a mechanism for operating the pawl-lever from the needlebar, in combination with the rack T T T, arm

as and for the purposes specified.

11. The feed-wheel K, having at its center a pinion, 7c, and a guide-pin,-k, operated by suitable devices in a forward direction only from the needle-bar, in combination with the rack T T T, guide-plate U, having edges a u, arm or support S S, and plates 0 P, for giving the plates a longitudinal and transverse reciprocating movement and limiting the travel of the pinion on the rack, substantially as and for the purposes specified.

12. The cloth holding and moving devices, consisting of a base-plate, N, transverse reciprocating plate 0, supported and guided on said base-plate, the longitudinal reciprocating plate I, supported and guided on plate 0, the spring clamping-plate Q, and clamping-lever R R, in combination with the arm or support S S, carrying a rack, T T T, and a drivingpinion and wheel operated from the needlebar for giving the material the required line of travel to work the button-hole slit. substantially as specified.

13., The feed-lever I I, operated from the needle-bar, pawl-lever J J, carrying the feedpawl j, arm or plate L, carrying the checkpawl l,'feed-wheel K, having its periphery provi ded with serrations, and having at its center a pinion, k, and guide-pin k, pivot or journal m, and head or block M, adapted to be attached to the presser-foot bar, in combination with the support or arm S S, rack T T T,

P, and transverse reciprocating plate 0, baseplate N, and clamp-plate Q, for holding the material and giving it the proper line of travel for working a button-hole, substantially as specified.

14. In a button-hole attachment for sewingmachines, consisting of a base-plate, a transverse reciprocating plate, a longitudinal reciprocating plate, aifd a clampingplate for holding the material, and an arm or support carrying a rack opera-ted by a driving-pinion from a feed-wheel having an intermittent rotary motion in a forward direction only from the machine, a guide-plate, U, having sides or edges of varying lengths for limiting the length of travel of the longitudinal plate to coincide with the length of button-hole, substantially as specified.

15. The sliding needle-clamp C C, carrying a needle, and provided with a rib or flange, c, and supported by a shank, B, and socket B from the needle-bar, vibrating cam D, having an acting portion, (1, anti-friction roller (1, spring or spring-arm stop 0, and head or support A, in combination with the spring H, feed-lever I I, pawl-lever J J, carrying a feedpawl, j fG6(1W11681 K, head or support M, arm

or support S S, rack T T T, and plates 0 P Q, substantially as and for the purpose specified. 16. The sliding needle-clamp O O, carrying a needle, and provided with a rib oi flange, c and supported by a shank, B, and socket B from the needle, vibrating cam D, having an acting portion, (1, anti-friction roller (1, spring or spring-arm g, adjustable pin or stud F, adjustable stop E e, set-screw z',and head or support A, in combination with the spring H, feed-lever I I, pawl-l ever J J, carrying a pawl j, arnror plate L, carrying the pawl Z, feedwheel K, provided with a pinion, 7c, and guide-pin k, head M, arm or support S S, rack T T T, guide-plate U, and plates 0 P Q, substantially as and for the purpose specified.

17. The sliding needle-clamp O O carrying the needle, andprovided with a rib or flange, c and supported by the shank l3 and socket 1% from the needle-bar, in combination with the vibrating cam I), having an acting por- IIO tion, (I, anti-frietion roller (1, spring or spring arm or plate L, carrying the pawl I, head or block M, base-plate N, and plates 0 P Q, lever B R, arm or support S S, rack T T T, and guide-plate U, substantially as and for the purposes specified.

JOHN IV. BLODGETT.

\Vitnesses:

ALBERT H. 'ADAMS, EDGAR T. Bonn. 

